/*
 * Copyright 2013-2019 Xia Jun(3979434@qq.com).
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 ***************************************************************************************
 *                                                                                     *
 *                        Website : http://www.farsunset.com                           *
 *                                                                                     *
 ***************************************************************************************
 */
package com.workcell.workdata.im.repository.specification;


import com.workcell.workdata.im.entity.Moment;
import org.springframework.data.jpa.domain.Specification;

import javax.persistence.criteria.CriteriaBuilder;
import javax.persistence.criteria.CriteriaQuery;
import javax.persistence.criteria.Predicate;
import javax.persistence.criteria.Root;
import java.util.ArrayList;
import java.util.List;

public class GallerySpecification implements Specification<Moment> {

    private final long uid;

    private GallerySpecification(long uid) {
        this.uid = uid;
    }

    @Override
    public Predicate toPredicate(Root<Moment> root, CriteriaQuery<?> query, CriteriaBuilder builder) {

        List<Predicate> predicatesList = new ArrayList<>();

        predicatesList.add(builder.equal(root.get("uid").as(Long.class),uid));

        CriteriaBuilder.In<Byte> typeIn = builder.in(root.get("type").as(Byte.class));
        typeIn.value(Moment.FORMAT_IMAGE);
        typeIn.value(Moment.FORMAT_VIDEO);
        typeIn.value(Moment.FORMAT_MULTI_IMAGE);
        predicatesList.add(typeIn);

        query.where(predicatesList.toArray(new Predicate[0]));

        return query.getRestriction();
    }


    public static GallerySpecification of(long uid) {
        return new GallerySpecification(uid);
    }


}
